Mount for lenses, mirrors, and the like.



R. A. OLDFIELD.

MUNT FOR LENSES, MIRRORS, AND THE LIKE.

APPLICATION HLED 00129. 1911.

LQ'BG, Patented Mar. 25, 1913.

iff/[n @new [fuzz/e/z//r f /y-M Mai" "11 tionwith v'or relation to the lenses, there-v L oem's Subject fetish-eA King-'of Great eidesieygeim-ngham, in' am dii 'mm1 lenen- 153m kineitlA has been the! practhex apparatus.` 7-li'e `r e,Y as is ecuently the 'casegsuchan apparatus will be well understood, generatedyf the. entire diameter of the expanded c a'isilig;v YV hen the -light is removed the con Vdenserraising, cooling more quickly than 'the z ggflriss'y;v contracts and crushes the glass, so to 40 speak', this frequently: resultingnn the. glass *being cracked or broken. All eiforts which f h ife do my knowledge .been directed with a Y View; tof the Lavoidance I of t his crackingV 4or .fbreaking 01E-tht glass by .the heaejhve been zd'ii-e ,ted-tosystems ofventilation in connecfby. f toprevent 4the latter froml .'beconiing over-heated. But the temperature oan' arc being veryxhighiitiseimpossible byr'these ieans to" satisfactorily overcomejtheadif--v` and Wherecool air isfreely circulated around or; inf-relation tothe glass, thedatter its' "bemgfunahlf tonbernallywit-hstandthe lens'elsef.thedendenserf" e 'Gr cilinder ivhichrisfrleedin tlieivieiiiity dfthegcondenser; vthe casing of 3 untlycracked ori broken b'ysreasoncof;

unequal expansion or 'contract-ion' resultant upon thevariationor irregularity of the vsur-` rounding tempera-ture.

The present invention has frfits'fprpose' encountered and to" introduce a 'modefof and articles Wherebyftheyare eiici'en'tly'i pf-ei Served from breakagenotwithstandingthe are subjected.

glass lens or other. article is' supported are ofi a resilient 'character l'adapted to i-cornniodate'theniselves 'to 'the expansion and com traction While they are moreover' ofsch' a manner thanhs heetofol'ebeen thecse'. In order that thisilivenolimy'belearly.

magic 'lantern showin-'g tiny firnproifenients Ain ventio'n described in it's applicationrto'acongraph apparatus, the two lenses 'v, b {of the unitari,v cylinder, as whas previously" been :the

ever is `formed `in twoh'lves'orv semi-circles c, c1 hin-ged togethe'rfat their one-extremities at c2 sc that they ca 'n befclosed around the lenses ai b and fastened'at theirfother ex# retain them inthe desired relation toeah other. At ca ch edge ofthe cylindr. an inlternal recess vd is provided d''p'tedito recei\je one of the lenses d, b'soj'that one( lens ends o, the s'erni-circulan sect-ionsTA 5101 toftgether `iS lilztlie hat-ure ofaf I tongue e Qn .temeer-,irenehvingsperimtwn e2- 'whicli` adaptedt receive a' je o n the to remove the. variousdiicultife's heretfore'i circumstances of temperatfu're'tof `which they- By my invention the' means hy i'liich the understood and more readily 'intovv pract-lcJ-ieferehcs .m'xbe' 111ml.' .tgtle ppended explanatory? sheet'of 'means for mounting or installing such glass A v character' thatv thelens can detached orf' removed 1n a `far' 'sirnpler and convenient' Fig irez vlfis ,a sectional 's ide'felev'tio'n ofa' conjunctionthereyi'ith. 2 isfa 'sectionl` front elevation taken 'on planet, 2 .''Eig. F1.

F 3 illustrates; the corirposite-f cylinden hereinafter referred to, the vvdrewings showing the part-s tliereof'in the ope'niositi'o'n in' ,In a convenient-enibodi'rnentthis' in- `condenser instead of being` secured`withina, v"

case, are inounted in a cylinder-Which how- A treniitiesatc to support the .lens'e's'a'b and ido .other section c?. Thel perforation@z is however elongated longitudinally of the tonguethe elongated slotezpfor expansion would bev to no purpose as expansion wouldl be prelvented by the outer cylinder f. A. resilient means of supporting the composite cylinder c, c1 within the outer cylinder f is therefore provided conveniently consisting of four or any suitable number of spring puppets g in the nature of projections mounted upon and radiating from the outer surface of the composite cylinder c, '01 and which projections g' butt against the inner surface of the outer cylinder f.l The projections being provided with springs gl may be depressed and they are advantageously in a constrained condition when the composite cylinder o, 01 is in place so that when said composite cylinder c, c1 expands with'thellenses a, b, this is accommodated for by the spring studs g being depressedmore and more toward the center oflthe cylinder c, c1.

. The annular intermediate space h between the inner cylinderc, c1 and the outer cylinderl f is conveniently 'closed at the rear (2'. e. the end nearest pthe light) by a ring or flange zprovided upon'the apparatus, and at the front, the said space is in like manner substantially closed up by any suitable arrangement. It may however be desirable to havea certain amount of Ventilating air cir-l culating in .between the cylinders c, G1 and f; this may enter at the front or it may enter -through holes f1 around the'circumference of theouter cylinder f. At the .point at which thetvvo sections of the composite cylinder are hinged together'a space j is left, a similar .space jl being left at the point at which they vare clipped or secured, these .spaces permitting of circulationof'the'air or ventilation between the lenses a, b.

If'any moisture should at any time condense upon the inner o'r adjacent surface of the lenses it will be .understood that it is quite a simple matter to remove the condenser, gain access to the lenses, cleanthem and replace them in' the apparatus;

' and contraction. Wherelspring puppets are? The use of spring puppets g aroundtlief composite'cylinder' 0, c may be departed rom as the said puppets may -be'replaced byany suitable form of spring arrangement eflic-iently supporting the condenser-and at t-he same time permitting ofits expansion employed however, theyf'may each take the formof a. small a. spring ..ag'ainst the .inner side of said casing and plunger which latter lby a 'shoulder is prevented Afrom being ,entirely pushed out and in which the spring gl-i's entirely inclosed in the casing'ass'hown in F ig. 2.'

The present' invention has considerable.

ment lampsare employed, maximum use is made of thisadvantage. -But where the means of illumination.liave"been, as for instance by the combustion of acetylene,- the heat generatedvdoes not permit of the light being placedi'close up -to the mirror by re`ason of .the breakages .which occur on account of the heat. lNow by the present in-` vention it is possible to place the illuminating flame much more closely to the reflector `Without danger ,and thus considerable increase in the illuminating poWer of the lamp is attained.

, In a convenient embodimentof tliepresent'invention as applied to a maiigiii mirror, the latter is provided around its circumfersible to the mirror and where electricv ilnence with four or any suitablel number of .ably securedindependently by gripping or ins l curling around the edge" of the' mirror. Iii this application the plunger of the puppet may haveascrew stern by whichit is secured to the lmp casing in which cas, the

casing of the uppetsf-is adapted Yto be displaceable and to project into a suitable aperture in the facial periphery of the mirror* AIt will be understood that in additionto the advantages of better illuinination, the

present invention as applied to reflectors has further the advantage of providing a convenient means by which tho reflector 'maybe detached from the lamp for cleaning or other purposes. lVhat I claim as my invention and desire to VsecureV by Letters Patent is:-

1. A mount for lenses, mirrors oi' the. like comprising a casing, an expansible carrying ring, a series of spring members dis-- posed at intervals around the circumference of said inner ring` and adapted to bear iso .i^.'; .if.lir1g for the radial enlargement or expansion of said carrying ring as and for the purpose specified.

il. A mount for lenses, mirrors or the like comprising a casing, an expansible carrying ring, a series of springpressed slidin members disposed at intervals around t e cirJ muuerenoe of said. carryin ring, and adapted to bear against the'lnner side of said casing, and fastening means for said mxjrying rin'g providing or radial expansion.

3. A mount for lenses, mirrors or the like, :.i-nsisiing of afeasing, a carrying ring in tno parts hingedly connected together, a series of spring-pressed sliding members disposed at intervals around the circumference of said innerring, and slidable fastening means upon the meeting ends of said inner ring.

In a mount for lenses. mirrors t the 4easing like, a resiliently supported carrying ring, consisting of two semi-circular members hingedly secured together, a fastener upon one of said members and a projection upon the otherv member, the fastener having a slot slidably engaging said projection.

5. .In a mount for lenses, mirrors or the like, a casing, a carrying ring consistin'gof two semi-circular members hingedly secured together, a fastener upon one of said members and la projection upon the other member, the fastener having a slot slidably en"-4 said projection, and lspring-pressed slidin within the casing. In witness Whereo I have hereunto set my hand in the presence of tWo Witnesses. R. A. OLDFIELD. vWitnesses RowLAND L. GooLn, HOLLIS F. BROWN.

members adapted to resiliently `sup- ,35 port t e carrying rin 

